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Red Hat Enterprise Linux 7 RHSA-2015:0749-01 Moderate: libxml2 DoS Issue

red hat
Calendar Grey March 30, 2015
Dist Redhat Esm H88
Patch released for libxml2 in Red Hat Enterprise Linux addressing a moderate risk level due to external entity exploits.
Updated libxml2 packages that fix one security issue are now available for Red Hat Enterprise Linux 7

Solution

Before applying this update, make sure all previously released errata relevant to your system have been applied.

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258

Summary

The libxml2 library is a development toolbox providing the implementation of various XML standards.
It was discovered that libxml2 loaded external parameter entities even when entity substitution was disabled. A remote attacker able to provide a specially crafted XML file to an application linked against libxml2 could use this flaw to conduct XML External Entity (XXE) attacks, possibly resulting in a denial of service or an information leak on the system. (CVE-2014-0191)
The CVE-2014-0191 issue was discovered by Daniel P. Berrange of Red Hat.
All libxml2 users are advised to upgrade to these updated packages, which contain a backported patch to correct this issue. The desktop must be restarted (log out, then log back in) for this update to take effect.

Topics%20covered

Topics Covered

security advisory moderate denial of service Red Hat Enterprise Linux system update libxml2 XML attack

References

https://access.redhat.com/security/cve/CVE-2014-0191 https://access.redhat.com/security/updates/classification/#moderate

Package List

Red Hat Enterprise Linux Client (v. 7):
Source: libxml2-2.9.1-5.el7_1.2.src.rpm
x86_64: libxml2-2.9.1-5.el7_1.2.i686.rpm libxml2-2.9.1-5.el7_1.2.x86_64.rpm libxml2-debuginfo-2.9.1-5.el7_1.2.i686.rpm libxml2-debuginfo-2.9.1-5.el7_1.2.x86_64.rpm libxml2-python-2.9.1-5.el7_1.2.x86_64.rpm
Red Hat Enterprise Linux Client Optional (v. 7):
x86_64: libxml2-debuginfo-2.9.1-5.el7_1.2.i686.rpm libxml2-debuginfo-2.9.1-5.el7_1.2.x86_64.rpm libxml2-devel-2.9.1-5.el7_1.2.i686.rpm libxml2-devel-2.9.1-5.el7_1.2.x86_64.rpm libxml2-static-2.9.1-5.el7_1.2.i686.rpm libxml2-static-2.9.1-5.el7_1.2.x86_64.rpm
Red Hat Enterprise Linux ComputeNode (v. 7):
Source: libxml2-2.9.1-5.el7_1.2.src.rpm
x86_64: libxml2-2.9.1-5.el7_1.2.i686.rpm libxml2-2.9.1-5.el7_1.2.x86_64.rpm libxml2-debuginfo-2.9.1-5.el7_1.2.i686.rpm libxml2-debuginfo-2.9.1-5.el7_1.2.x86_64.rpm libxml2-python-2.9.1-5.el7_1.2.x86_64.rpm
Red Hat Enterprise Linux ComputeNode Optional (v. 7):
x86_64: libxml2-debuginfo-2.9.1-5.el7_1.2.i686.rpm libxml2-debuginfo-2.9.1-5.el7_1.2.x86_64.rpm libxml2-devel-2.9.1-5.el7_1.2.i686.rpm libxml2-devel-2.9.1-5.el7_1.2.x86_64.rpm libxml2-static-2.9.1-5.el7_1.2.i686.rpm libxml2-static-2.9.1-5.el7_1.2.x86_64.rpm
Red Hat Enterprise Linux Server (v. 7):
Source: libxml2-2.9.1-5.el7_1.2.src.rpm
ppc64:

Read the Full Advisory


Advisory ID: RHSA-2015:0749-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2015:0749.html
Issue date: 2015-03-30

Topic

Updated libxml2 packages that fix one security issue are now available forRed Hat Enterprise Linux 7.Red Hat Product Security has rated this update as having Moderate securityimpact. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available from the CVE link in theReferences section.

Topics%20covered

Topics Covered

security advisory moderate denial of service Red Hat Enterprise Linux system update libxml2 XML attack

Relevant Releases Architectures

Red Hat Enterprise Linux Client (v. 7) - x86_64

Red Hat Enterprise Linux Client Optional (v. 7) - x86_64

Red Hat Enterprise Linux ComputeNode (v. 7) - x86_64

Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64

Red Hat Enterprise Linux Server (v. 7) - ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Server Optional (v. 7) - ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Workstation (v. 7) - x86_64

Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64

Bugs Fixed

1090976 - CVE-2014-0191 libxml2: external parameter entity loaded when entity substitution is disabled

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